Duke S. Rogers 1981 Journal 5 November 0600 hrs Arose, dressed, and loaded car. 0640hrs left hotel and Puebla for Mexico City. 0810hrs Stopped for breakfast at Rio Frio. 1030 hrs Arrived Mexico City. We will attempt to get liquid nitrogen from the place I purchased it in 1979 1345hrs Returned by taxi to the place Stan and Faircl were waiting. After approx. one hour of searching the area for the Aga plant with no success, hired a taxi and checked out an address. Turned out to be just an Aga office. They gave me another address. The directions to the plant are as follows: when heading north on the Periferico (towards Hwy 57 to Queretaro) take exit to the right - Gustavo Baz. This exit is ca. 2-3 mi north of Chapultepec Park. Gustavo Baz is a main street with two-three lanes each way. Continue on this street for a long way, ca. 7 miles. The street needed for the Aga plant is Rio Lerma. The street is 4-5 blocks (right hand turn) past a streetsign for the road named Tlalnepantla (also going to the right). So: once you pass the street of Tlalnepantla continue on Gustavo Baz for 4-5 more blocks, then turn right or to Rio Lerma. The street address for the Aga plant is Rio Lerma #15. It is on the right hand side of the street ca .5 miles from Gustavo. We immediately